Sunstone - variety of Oligoclase (Plagioclase). Feldspar Group.
Location: Tanzania.
Tabular sample (4.0 x 1.5 x 2.0cm and 19 grams) with clear perfect cleavage Orange brown in color and with a vitreous lustre, it presents the typical Schiller or adularescent effect combined with small metallic reflections of thin hematite or goethite lamella inclusions, which is why was given the name Sunstone.